中文摘要：

提出了一种单相串联型直流侧有源电力滤波器。与传统的单相有源电力滤波器相比，有源开关的数量减少了一半，简化了电路结构，降低了成本。串联型直流侧有源电力滤波器采用双环控制，电流控制跟踪电源电压变化，电压控制调整有源电力滤波器的能量流向。通过改变有源电力滤波器上储能电容电压极性，实现对电感电流的连续可控，提供负载所需要的谐波电压，使电源电流成为与电源电压同频同相的正弦波，从而实现谐波治理。这种控制方法具有结构简单、补偿效果好等优点。仿真结果验证了所提出理论的正确性。

英文摘要：

A single-phase series direct current （DC） side active power filter （APF） was proposed. Compared with a traditional active power filter, the APF has fewer active switches, which simplifies filter current structure and reduces its cost. APF of DC was controlled by dual cycles. Thus, the current control could track power supply changes. The APF power flow was regulated by voltage control. By changing the polarity of the storage capacitor voltage, the inductor current could be controlled continuously. This provided the required harmonic voltage which aligned the frequency and phase of the supply current sine wave with the supply voltage, and achieved harmonic governance. This method has many advantages including a simple structure and good compensation. The proposed theory was verified by simulation results.